Class | PhusionPassenger::AbstractServer |
In: |
lib/phusion_passenger/abstract_server.rb
|
Parent: | Object |
An abstract base class for a server that has the following properties:
The server will also reset all signal handlers. That is, it will respond to all signals in the default manner. The only exception is SIGHUP, which is ignored. One may define additional signal handlers using define_signal_handler().
Before an AbstractServer can be used, it must first be started by calling start(). When it is no longer needed, stop() should be called.
Here‘s an example on using AbstractServer:
class MyServer < PhusionPassenger::AbstractServer def initialize super() define_message_handler(:hello, :handle_hello) end def hello(first_name, last_name) connect do |channel| channel.write('hello', first_name, last_name) reply, pointless_number = channel.read puts "The server said: #{reply}" puts "In addition, it sent this pointless number: #{pointless_number}" end end private def handle_hello(channel, first_name, last_name) channel.write("Hello #{first_name} #{last_name}, how are you?", 1234) end end server = MyServer.new server.start server.hello("Joe", "Dalton") server.stop
ignore_password_errors | [RW] | |
max_idle_time | [RW] | The maximum time that this AbstractServer may be idle. Used by AbstractServerCollection to determine when this object should be cleaned up. nil or 0 indicate that this object should never be idle cleaned. |
next_cleaning_time | [RW] | Used by AbstractServerCollection to remember when this AbstractServer should be idle cleaned. |
password | [R] |
Connects to the server and yields a channel for communication. The first message‘s name must match a handler name. The connection can only be used for a single handler cycle; after the handler is done, the connection will be closed.
server.connect do |channel| channel.write("a message") ... end
Raises: SystemCallError, IOError, SocketError
Start the server. This method does not block since the server runs asynchronously from the current process.
You may only call this method if the server is not already started. Otherwise, a ServerAlreadyStarted will be raised.
Derived classes may raise additional exceptions.
Start the server, but in the current process instead of in a child process. This method blocks until the server‘s main loop has ended.
All hooks will be called, except before_fork().
Stop the server. The server will quit as soon as possible. This method waits until the server has been stopped.
When calling this method, the server must already be started. If not, a ServerNotStarted will be raised.
A hook which is called when the server is being started, just before forking a new process. The default implementation does nothing, this method is supposed to be overrided by child classes.
Define a handler for a message. message_name is the name of the message to handle, and handler is the name of a method to be called (this may either be a String or a Symbol).
A message is just a list of strings, and so handler will be called with the message as its arguments, excluding the first element. See also the example in the class description.
A hook which is called when the server is being stopped. This is called in the child process, after the main loop has been left. The default implementation does nothing, this method is supposed to be overrided by child classes.